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author | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2018-04-19 14:50:28 +0200 |
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committer | Shuah Khan (Samsung OSG) <shuah@kernel.org> | 2018-05-30 15:21:51 -0600 |
commit | 6d73ceab4d03c25d3a351723c72ad25d4c8cd643 (patch) | |
tree | 1eaad23e7cf89f31d08d730bac410a849489370c /tools/testing/selftests/timers | |
parent | 843b20bcb82f1f61d7da7a693362bf6f09c73169 (diff) | |
download | linux-6d73ceab4d03c25d3a351723c72ad25d4c8cd643.tar.bz2 |
selftests: timers: rtcpie: restore previous PIE rate
After the test ends, restore the PIE rate to its previous value to be less
disruptive.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>
Diffstat (limited to 'tools/testing/selftests/timers')
-rw-r--r-- | tools/testing/selftests/timers/rtcpie.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/tools/testing/selftests/timers/rtcpie.c b/tools/testing/selftests/timers/rtcpie.c index ea98b1f6ac17..47b5bad1b393 100644 --- a/tools/testing/selftests/timers/rtcpie.c +++ b/tools/testing/selftests/timers/rtcpie.c @@ -28,7 +28,7 @@ static const char default_rtc[] = "/dev/rtc0"; int main(int argc, char **argv) { int i, fd, retval, irqcount = 0; - unsigned long tmp, data; + unsigned long tmp, data, old_pie_rate; const char *rtc = default_rtc; struct timeval start, end, diff; @@ -51,7 +51,7 @@ int main(int argc, char **argv) } /* Read periodic IRQ rate */ - retval = ioctl(fd, RTC_IRQP_READ, &tmp); + retval = ioctl(fd, RTC_IRQP_READ, &old_pie_rate); if (retval == -1) { /* not all RTCs support periodic IRQs */ if (errno == EINVAL) { @@ -61,7 +61,7 @@ int main(int argc, char **argv) perror("RTC_IRQP_READ ioctl"); exit(errno); } - fprintf(stderr, "\nPeriodic IRQ rate is %ldHz.\n", tmp); + fprintf(stderr, "\nPeriodic IRQ rate is %ldHz.\n", old_pie_rate); fprintf(stderr, "Counting 20 interrupts at:"); fflush(stderr); @@ -124,6 +124,8 @@ int main(int argc, char **argv) } done: + ioctl(fd, RTC_IRQP_SET, old_pie_rate); + fprintf(stderr, "\n\n\t\t\t *** Test complete ***\n"); close(fd); |